摘要
2020年7月长江中下游发生流域性特大洪水,长江中游干流河段高水位持续居高不下。基于汉口水文站暴雨洪水资料,对此次暴雨强度、洪水特性等进行了全面分析,并与典型年1998年和2016年大洪水进行了多方面比较,对此次特大洪水特点进行了分析总结。结果表明:2020年梅雨期降水总量大,降雨历时长;2020年洪水峰高量大;2020年汉口站洪峰比1998年和2016年同流量的水位偏高,洪峰水位落差相比1998年和2016年要低。研究结果可为后期水文测报工作提供参考。
A basin-wide storm flood occurred in the middle and lower reaches of Yangtze River in July,2020,the water level of Middle Yangtze River stayed high constantly.Based on the rainstorm flood data of Hankou hydrologi⁃cal station,the rainstorm intensity and the characteristics of floods were analyzed and compared with those of the typical historical heavy rainstorm floods in 1998 and 2016 and the characteristics of the catastrophic flood were ana⁃lyzed and summarized.The results showed that the total amount of precipitation during the Meiyu period in 2020 was large,and the rainfall history is long and the flood peak was high and the flood volume was large.The flood peak water level of Hankou station in 2020 is higher than that of 1998 and 2016,and the drop of flood peak water level was lower than that of 1998 and 2016.The research results can provide a reference for the future hydrological fore⁃casting work.
作者
王佳妮
罗倩
WANG Jiani;LUO Qian(Middle Changjiang River Bureau of Hydrology and Water Resources Survey,Bureau of Hydrology,Changjiang Water Resources Commission,Wuhan 430012,China)
出处
《水利水电快报》
2021年第5期1-5,共5页
Express Water Resources & Hydropower Information
关键词
暴雨洪水
洪水特性
洪水过程分析
汉口水文站
武汉河段
长江中游
storm and flood
flood characteristics
flood process analysis
Hankou hydrological station
Wuhan reach
middle Yangtze River
